Wallpaper Measurements: Why Ordering the Right Amount Is Crucial
Wallpaper is one of the most powerful ways to transform a room—but one of the most common (and expensive) mistakes people make is ordering the wrong amount.
Whether you're a homeowner, interior designer, or contractor, understanding how to measure wallpaper correctly can save time, money, and frustration. In this guide, we’ll break down why accurate measurements matter and how to avoid the most common wallpaper ordering mistakes.
Why Accurate Wallpaper Measurements Matter
Ordering wallpaper isn’t like buying paint. You can’t simply go back and get an exact match later if you run out.
1. Risk of Discontinued Wallpaper
Wallpaper collections change frequently. If you don’t order enough:
The design may be discontinued
Stock may be unavailable
You may be forced to choose a completely different wallpaper
This is one of the biggest risks of under-ordering.
2. Dye Lot (Batch) Variations
Wallpaper is printed in batches (also called dye lots). Even if the same design is available later, colors can slightly vary between batches.
This can result in:
Visible color differences on your wall
An uneven, unprofessional finish
Understanding Wallpaper Pattern Matching
If your wallpaper has a pattern, measurement becomes even more important.
What Is Pattern Repeat?
Pattern repeat is the vertical distance before the design repeats itself. To align patterns between strips, extra material is often cut and discarded.
Why Pattern Matching Affects Quantity
Large patterns = more waste
Drop match patterns = even more material needed
Incorrect calculations can leave you short mid-project
How Much Extra Wallpaper Should You Order?
Professionals always recommend ordering more wallpaper than your wall measurements suggest.
General Rule of Thumb
10% extra → Small or simple patterns
15% extra → Medium repeats
20% extra → Large patterns or complex layouts
Why Extra Wallpaper Is Essential
Wallpaper installation involves more than covering flat walls.
You’ll need extra material for:
Cutting around windows and doors
Matching patterns at seams
Adjusting for uneven ceilings or walls
Fixing installation mistakes
Even small miscalculations can lead to running out of material at the worst time.
Don’t Subtract Windows and Doors
A common mistake is subtracting areas like windows and doors from your total wall measurement.
In reality, this often causes problems because:
Offcuts can’t always be reused
Pattern alignment still requires full-length strips
More waste is generated than expected
Pro tip: Always measure full wall dimensions and rely on your extra percentage instead of subtracting too much.
Pro Tips to Avoid Wallpaper Mistakes
Always measure wall height and width accurately
Check the pattern repeat before ordering
Order all rolls at the same time (same batch)
When in doubt, order extra—not less
Final Thoughts
Getting wallpaper measurements right is the key to a smooth and successful installation.
Ordering the correct amount helps you:
Avoid discontinued designs
Ensure perfect pattern alignment
Prevent delays and added costs
Achieve a flawless finish
When it comes to wallpaper, having extra is always better than running short.